What a fantastic plan. I made one for my granddaughter. It has two advantages over the doll house I made years ago. (1) It can be unstacked and shipped. This one will be shipped. (2) It allows the child to restack and rearrange rooms. My grandaughter loves to rearrange things. It is an "engineering inclination" according to her mother. Well, she can rearrange these rooms as many times as she likes.
I made only one change to the published plan. I expanded the rooms to 8" wide, 8" high and 16" long in order to accommodate a piece of furniture my son-in-law had already made. Maintaining the 2-to-1 ratio keeps everything fitting together well.
Thank you again.